Chill for sand molds



Nov. 24, 1931. w. B. ROBE 1,833,128

CHILL FOR SAND MOLDS Filed Nov. 19, 1928 Patented Nov. 24, 1931 PATENT OFFICE WALTEN B. ROBE, OF IOWSON, MARYLAND CHILL FOR SAND MOLDS Application fil ed November 19, 1928. Serial No. 320,453.

My invention relates to improvements in chills for sand molds.

The object of my invention is to provide a chill for a sand mold having means for holding the chill in the sand in the cope after the pattern has been removed therefrom and the same inverted upon the drag.

' Another object of my invention is to provide a chill more particularly adapted for chillingthe depression in a cylinder head around the spark plug opening and the chill carrying a removable pin whereby the spark plug opening through the top walls of the cylinder head is chilled, and at the same time providing means, whereby the pin may be readily removed from the casting independ ent of the chills.

A further object of my invention is to provide a chill of this character which is simple in construction and readily assembled, and having certain details of structure and com bination of parts hereinafter more fully set forth.

In the accompanying drawings Figure 1 is a vertical transverse sectional view of a mold showing my improved chill in position after the cylinder head has been cast.

Figure 2 is a vertical sectional View similar to Figure 1, showing the chill in position on the pattern.

Figure 3 is av sectional view similar to Figure 2 showing the pattern removed and the chill held in position in the cope and showing the sand core in position.

Figure 1 is a perspective view of one of the chills showing the pin in dotted lines, removed from the chill.

Referring now to the drawings, 1 represents the drag which is provided with the supports 2 and 3 adapted to support the chills 4 and 5 for forming the two depressions or combustion chambers in a gas engine cylinder head. The drag 1 also carries the supports 6, whereby the side chills 7 are supported and held against lateral movement by means of the pins 8, all of which forms no part of this invention, but is shown to illustrate the operation of my improved chill. The drag 9 is of the usual construction and in assembling the mold the pattern 10 is placed in the cope in the usual manner and my improved chills 11 are placed in the depressions 12 in the upper face of the pattern. The chills 11 have the main body portion 13 of a curved form having at its upper end a laterally extending flange 14 adapted to rest upon the upper face of the pattern 10 and whereby it is held in its proper position in the depression in the pattern. The main body portion is provided with an opening 15 extending therethrough and into which extends the pin 16, provided with the head 17 adapted to rest upon the main body portion of the chill and support and limit the downward movement of the pin in the chill. The pin 16 as shown is of a length to extend down through the opening 16 in the pattern 10 and rest upon the upper ends of the chills 1 and 5, as clearly shown in Figure 1, and said pin forming the opening in the cylinder head into which the spark plugs are screwed and thus it will be seen that the metal of the opening around the pin is chilled and also the metal around the depression is chilled so that threads formed in the'opening in the cylinder will not be stripped by the spark-plug.

The upper face of the body portion of the chill 11 is provided with upwardly extending arms 18 and 19 having laterally turned ends 20 and 21 and said arms preferably made of steel wire, but could be made of bar metal or the like.

In operation it will be seen that the pattern is first placed in thecope in the usualinanner and the chills 11 placed in the depressions in the pattern with the pin 16 extending down to the space provided for the chills 1 and 5 in the pattern. The sand is then packed in the cope above the pattern and around the arms 18 and 19, and when the pattern is removed as shown in Figure 3 of the drawings, it will be seen that the chills 11 are held in position so that when the cope is inverted and placed upon the drag they will be rigidly held in their proper position and will also be maintained in the proper position so that the pins will pass through the spaces provided therefor in the pattern. After the cylinder has been cast itis removed from the drag and a punch is used to drive the pins 16 from the openings in the cylinder heads and the chills are then removed or drop from the castings.

Having thus fully described my invention what I claim is 1. A chill for sand molds comprising a body portion and outwardly extending arms carried thereby and around which the sand is packed and adapted to hold the chill in position when the pattern is removed from the cope.

2. A chill for sand molds comprising a body portion and outwardly extending arms carried thereby, and having laterally turned ends and adapted to be surrounded by the sand in the cope and hold the chills in position when the pattern is removed from the cope.

3. A chill for sand molds comprising a body portion, and outwardly extending arms carried thereby and around which the sand is adapted to be packed, and a removable pin carried by the chill for forming a hole in the casting to provide a. spark plug opening through the head.

1. A chill for molds comprising a body portion, holding means therefor and a pin passing through the chill and extending beyond the body portion.

5. A chill for molds comprising a body portion, means carried thereby adapted to extend into the sand or" the cope and hold it in position, and a headed pin passing through the chill and extending beyond the body portion thereof.

6. A chill for molds comprising a body portion, holding means therefor and a headed pin passing through the chill and extending beyond the body portion thereof.

7. A chill for sand molds comprising a body portion having an opening therethrough, and a removable pin passing therethrough from one side and extending beyond the other side of the body portion.

8. A chill for sand molds comprising a body portion, vertically extending arms carried thereby and having laterally turned ends around which the sand is packed and adapted to hold the chill in position when the pattern is removed from the cope.

9. A chill for sand molds comprising a body portion, outwardly extending arms carried thereby and having laterally turned ends around which the sand is packed and adapted to hold the chill in position when the pattern is removed from the cope and a removable headed pin passing through the body portion of the chill from one side and extending beyond the opposite face of the chill.

10. A chill for sand molds comprising a body portion, upwardly extending arms carried by the body portion and a removable pin passing through the body portion between the arms.

11. A chill for molds comprising a body portion, upwardly extending spaced arms carried by the body portion and a removable pin passing through the body portion between the arms.

12. A chill for sand molds comprising a body portion, two upwardly extending spaced arms carried by the body portion and having laterally turned upper ends.

13. A chill for sand molds comprising a body portion, two upwardly extending spaced arms carried by the body portion and having laterally turned ends and a removable pin passing through the body portion between the arms and extending beyond the lower end of the body portion.

14. A chill for sand molds comprising a body portion, means carried thereby and adapted to extend into the sand of the cope and hold it in position and a pin passing through the chill between the holding means.

15. A chill for molds comprising a body portion, holding means therefor and a headed pin passing through the chill and extend ing beyond the body portion.

16. A mold comprising a drag, chill sup ports carried by said drag, chills supported upon said supports, a cope resting upon the upper end of the drag and chills in said cope and comprising a body portion having outi wardly extending arms having laterally turned ends around which the same is packed in the cope and adapted to hold the chill in position when the pattern is removed from the cope.

In testimony whereof, I have signed this specification.

WALTEY B. ROBE. 

